Manufacture of sulphite acid liquor



Feb, 21, 1933.

J. D. JENSSEN MANUFACTURE OF SULPHITE ACID LIQUOR Filed July-'7, 1950VAI/:ufr MIMOFW WANA A En f Bmw QOQ,

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Patented Feb. 21, 1933 UNITED STATES PATENT OFFICE JACOB BARRE JENssEN,or lNEW YORK, N. Y., AssreNoR To e. D. .TENssEN COMPANY,

` or NEW Yonx, N. Y. A j

MANUFACTURE OF SULPHITE ACID LIQUOR Application filed July 7, 1930.YSerial No. 466,175.

The invention relates to the manufacture of sulphite acid liquor, asdescribed in the present specification and illustrated in theaccompanying drawing that forms part of the same.

The invention consists essentially in the means employed forstrengthening the free acid liquor resulting from combining-the elementsin association with the aforesaid means as pointed out in the claim fornovelty following a description in detail of the preferred form of theinvention. Y

The objects of the invention are to produce an acid liquor that will notmaterially vary in regard to the proportions of its contentsparticularly in respect to lime quantities which are apt tov changeconsiderable under different Weather conditions as for example, in thehot weather, the disintegration of the lime is greatly increased `whilein the cold weather the lime resists the attack of the gases so that themaximum quantity of lime absorbed in the water with the gases on warmdays is much in excess of the requirement,

while on cooler days, the maximum quantityk absorbed is approximatelycorrect, therefore to regulate these quantities insures an even cookingliquor and better pulp; to maintain the continuity of the process in theproduction of acid liquor, that is to say, to introduce in the knownmethods of making acid liquor an auxiliary means whereby the directionof the flow is so adjusted as to divert the gas in order to obtain twodistinct operations under 35 different conditions; to utilize existingsystems to the greatest extent possible and at the same time adjust thediierences in regard to the contents without materially adding to thecost of production; and generally to provide for cooking purposes inpulp processes an acid liquor of superior quality notwithstanding thenatural fluctuations due to temperature conditions.

The drawing is a diagrammatic view showing the essential elementscontributory to the carrying out of this invention.

Referring to the drawing, the numeral 15 indicates the tower or tankforming the receptacle in which the ingredients are combined to producean acid liquor.

Usually these ingredients are lime and S02 gas emanating from thesulphur burner indi cated by the numeral 16. This gas usually goesthrough various devices such as coolers and Hows along within the gasinlet feed pipe 17 to the tower or tank 15 herein shown as .theabsorption receptacle and the valve 18 is introduced in the gas inletpipe line to- Wards the receptacle end. j

The auxiliary receptacle 19 contains inert material 20, such as blocksof hardwood or other material adapted to `resist the attack of thegases, this inert material being supported on the grate 21 and arrangedina pile of broken or separated pieces which will per- ,l mit thetrickle of the acid liquor' there through and through'the gratetherebelow.

The as inlet pipe line 22 taps the pipe line 17 efore it reaches thevalve 18 andthis pipe line 22 extends to the inlet 23 near to the lowerend of the auxiliary receptacle 19.

The pressure blower 24 is introduced in the pipe line 22 before itreaches the auxiliary receptacle 19,thus forcing'in the gas at aconsiderable pressure below the grate 21.

Above the inert material the return pipe line 25 extends from the gasoutlet 26 and leads tothe pipe line 17 and. communicates therewithbetween the valve 18 and the inlet to the receptacle 15. -V

The valve 27 is introduced in the pipe line 25` adjacent to theauxiliary receptacle and this is a Very important valve, as by means ofthis valve the pressure is very nely regulated within the auxiliaryreceptacle.

Therefore the absorption of gas is carefully adjusted to the needs ofthe occasion.

The pipe line 28 leads into the receptacle 15 from a suitable watersupply and thepipe line 29 leads from the bottom of the receptacle 15 tothe free acid liquor inlet` 30 at the top of the receptacle 19,consequently the water which has enteredthe receptacle 15 after it hasbecome charged with lime and SO2 to the extent required flows through toVthe pipe line 29 in the formv of free acid liquor into the auxiliaryreservoir 19 and from there trickles down through the inert materialmeeting. the rising gases which are forced into the auxiliary receptaclebelow Vthe grate and held back therein at the desired pressure and picksup the quantity of S012 according to the strength required-and fallsdown below the grate Where it passes out.

The looped pipe line 31 extends from the outlet 32 of the auxiliaryreservoir downwardly and upwardly to the storage tank 33 and thus at alltimes a water seal is provided in the trap- 34 at the bottom of thisoutlet pipe line, the upwardly extending leg 85 to the storage tankbeing also filled with acid liquor to complete the seal, therebypreventing the loss of gas from the auxiliary tank through the outlet32. v

The valve 36 is provided inthe pipe line 31 if required. The pump 37 anda valve 38 are also introduced in the pipe line 29 one on either side ofthe pipe line 39, which forms the `direct passage from the tank 15 tothe storage tank 33, when it is desired to cut out the auxiliary tank ortower 19.

The valve 40 is also introduced in the pipe line 89 so as to effectivelycut out the storage s tank when the delivery is entirely to theauxiliary receptacle 19. The valve 4"? is introduced in the pipe line 22for obvious purposes.

The operation of this invention has been fairly well described inexplaining the uses of the several elements, but .brieliy it may bestated that the SO2 vgas is prepared in the most acceptable manner andflows through a main pipe line to the tank, tower or receptacle 15 wherelime is being treated in the preferred manner. f

The acid liquor produced in this receptacle 15 falls to the bottom andin carrying out this invention is transferred by an outlet pipe line tothe top of an auxiliary tank, tower or receptacle where it tricklesthrough inert Inaterial and meets a gas, which also comes from the mainpipe line, but through a branch supply of SO2 gas, a primary receptacletowards its lower end connected to said gas pipe and at its upper end toa water supply and containing a lime element, an auxiliary receptacleconnected at the upper end to the lower end of the aforesaid receptacleand containing acid resisting inert material in irregular pieces, asupplementary feed pipe tapping the main gas feed pipe and communicatingwith the lower portion of said auxiliary receptacle below said inertmaterial Vand a pressureblower introduced therein, a

passage' which taps the main pipe line,'a

pressure blower being introduced to give greater force to theVdelivery'of gas into the auxiliary receptacle below the grate. f f

lMeanwhile the valve 27 has been carefull; adjusted so as to obtainwithin the receptacle 19 the desired pressure for it is advisable tohave a considerable pressure within this auxiliary receptacle in orderthat a considerable quantity of SO2 gas may be absorbed, but at the sametime, it is necessary to have an outlet for the gas as the nitrogen isnot useful and must find an outlet, but this nitrogen carries away withit a considerable quantity of oxygen and sulphur gas and this is againuseful and is returned to the receptacle 15 to reinforce the gas alreadypassing thereinto from the main line of piping, the nitrogen finallypassing off at the upper end of the main receptacle.

What I claim is j f In the manufacture of acid liquor, a main line gasfeed pipe leading from a source of

